Cadillac 2005 XLR - Manual (Page 316)

The fuel door release
button is located on the left
side of the instrument
panel. The button
only works when the
vehicle is in PARK (P) or
NEUTRAL (N) and the
valet lockout button
is in OFF.
An alternate fuel door release is located inside the trunk
behind a panel on the driver’s side of the vehicle. Pull
the handle to release the fuel door.
To remove the fuel cap, turn it slowly to the left
(counterclockwise). The fuel cap has a spring in it; if the
cap is released too soon, it will spring back to the right.
While refueling, hang the tethered fuel cap from the
hook on the fuel door.
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